Plan for Solubility Lab: Add specific amount of each chemical. (the tip of a lab scoop)
10 mL Water and Zinc Oxide 10 mL Water and Copper Sulfate
Question: Are Zinc Oxide and Copper Sulfate soluble in water? Hypothesis: The Copper Sulfate will be soluble and the Zince Oxide won't be. Dependent Variable: if it's soluble in water. Independent Variable: the type of solute you are using.
Observations: Zinc Oxide is not soluble. Copper 2 Sulfate is soluble.
4/12/11 --11 days before Karley's birthday :) KOOL-AID LAB
Question: Does the temperature of the water effect how fast the kool-aid will dissolve in water? Hypothesis: The kool-aid will dissolve the fastest in hot water. Independent Variable: The temperature of the water. Dependent Variable: The time it takes to dissolve in water. Constants: Amount of water, amount of kool-aid added, and the starting time.
The First Time We Tried: We used 20 mL of water and 2 grams of kool-aid. Since, we didn't mix it, the kool-aid sat at the bottom of the test-tube and just sat there. Since, it couldn't dissolve any further we decided to try again.
Our Second Try: This time we used 20 mL of water and only 0.5 grams of Kool-aid. Instead we decided to mix the test-tubes by shaking them. This worked out better and this was our results:
-In 20 mL of cold water at 12 degrees celcius it took 2 minutes and 53 seconds to dissolve. -In 20 mL of room temperature water at 21 degrees celcius it took 3 minutes and 6 seconds to dissolve. -In 20 mL of Boiled water at 56 degrees celcius it took 2 minutes and 38 seconds to dissolve.
4/19/11 Solubility Curve Lab:
Question: Does the temperature of the solvent affect the solubility of a mystery solute? Hypothesis: Yes, it will. Independent Variable: Temperature (degrees Celsius) Dependent Variablel: Solubility (g/100 mL) Constants: Volume of Water, Weighing Paper, Type of Solute Procedures: 1. Measure 10, 8, 6, and 4 grams of solute. 2. Put solute in test tube with 10 mL of water. 3. Mix using a lab scoop while holding the test tube in a hot water bath. 4. After it has dissolved, place in a test tube rack and allow to cool. 5. Record the temperature when the first crystals appear.
The substance is: Potassium Nitrate. 4/26/11 Chemicals-Hazardous?! Calcium Chloride: CaCl2 -harmful if swallowed or inhaled -irratates skin, eyes, and respiratory tract -soluble in water -white or gray NOT SAFE!!!
Sodium Bicarbonate(Baking Soda): NaHCO3 -can be consumed -may cause irritation, redness, or pain to eyes SAFE!!!
Bromothymol Blue: C27H28Br2O5S -pH indicator -soluble in water -toxic to lungs -turns yellow when carbon dioxide is added -green when it's neutral -it can be blue when it's a base greater than 7
Water: H2O -has hydrogen and oxygen -non toxic -drinkable -no need for lab glasses when using it
Chemical Reaction Clues: -temperature change -color change -gas formation -change of state -can catch on fire -explosions -solid formation
Chemical Reaction Lab: Question: What combinations of compounds will react chemically?
Hypothesis: Everything but Calcium Chloride & Water, Sodium Bicarbonate & Water, and Bromothymol Blue & Water will react.
Dependent Variable: Observations of chemical reactions.
Independent Variable: Different combinations of chemicals.
Constants: Amount of each chemical, and Mass of each chemical.
Summary: All but three were exothermic changes. Those that were increased in temperature, while the other three either did nothing or decreased. Two of the other three were endothermic because they decreased in temperature. These were the Sodium Bicarbonate & Water, and the Sodium Bicarbonate & Bromothyl Blue. The other one, Sodium Bicarbonate & Calcium Chloride, did nothing because it was two solids being mixed together. Although, when mixed with water they did have a chemica reaction. 5/10/11
Law of Conservation of Mass Lab:
Question: How will the mass of the reactants compare to the mass of the products in a reaction that produces a solid percipitate?
Hypothesis: The mass will stay the same due to the law of conservation of mass.
DV: The mass of the products (g) IV: The mass of the reactants
Constants: -Mass of the glasswear -same glasswear -same balance
Procedures: 1. Zero the triple beam balance. 2. Then place the glass beaker with the chemicals in it on top. 3. Measure them and then record. 4. Dump them into the beaker and then measure again. 5. Record the products. (g) 6. Subtract and find the change in mass. 7. Do this again for 2 more trials after properly cleaning everything in between.
Observations: -The mass of the products, 6.8, was 0.2 grams less than the mass of the reactants (7) : TRIAL 1 -The mass of the products and the reactants was 3.8 -there was no change : TRIAL 2 -The mass of the products and the reactants was 3.3 -there was no change : TRIAL 3
Conclusion: The hypothesis was supported because the majority of the data showed that the mass was not affected. It was both a suspension and a solution. It was a suspension because the solid particles were heavy enough to settle out, but it was also a solution because when it is filtered out, it's not just pure water, it's a solution.
Question: How will the mass of the reactants compare to the mass of the products in a reaction that produces a gas? Hypothesis: The mass will not change due to the law of conservation of mass. Dependent Variable: The mass of the products. (g) Independent Variable: The mass of the reactants. (g) Constants: mass of the glassware, same balance, same glassware
What do we have in common?
We are all in science class and we like chicken(:
PS. Don't Get It Twisted... LIKE A PRETZEL.
4/6/11 Solubility
Solubility is the ability to dissolve in water.
Copper 2 sulfate:
- Harmful to the enviornment
- Dangerous
- It's a salt
- (chemical compound)
- occurs in different colors:
(green,white,bright blue)Zinc Oxide:
These are links to the websites that we used to find all this information.
http://en.wikipedia.org/wiki/Copper(II)_sulfate
http://en.wikipedia.org/wiki/Zinc_oxide
Plan for Solubility Lab:
Add specific amount of each chemical. (the tip of a lab scoop)
10 mL Water and Zinc Oxide
10 mL Water and Copper Sulfate
Question: Are Zinc Oxide and Copper Sulfate soluble in water?
Hypothesis: The Copper Sulfate will be soluble and the Zince Oxide won't be.
Dependent Variable: if it's soluble in water.
Independent Variable: the type of solute you are using.
Observations:
Zinc Oxide is not soluble.
Copper 2 Sulfate is soluble.
4/12/11 --11 days before Karley's birthday :) KOOL-AID LAB
Question: Does the temperature of the water effect how fast the kool-aid will dissolve in water?
Hypothesis: The kool-aid will dissolve the fastest in hot water.
Independent Variable: The temperature of the water.
Dependent Variable: The time it takes to dissolve in water.
Constants: Amount of water, amount of kool-aid added, and the starting time.
The First Time We Tried:
We used 20 mL of water and 2 grams of kool-aid. Since, we didn't mix it, the kool-aid sat at the bottom of the test-tube and just sat there. Since, it couldn't dissolve any further we decided to try again.
Our Second Try:
This time we used 20 mL of water and only 0.5 grams of Kool-aid. Instead we decided to mix the test-tubes by shaking them. This worked out better and this was our results:
-In 20 mL of cold water at 12 degrees celcius it took 2 minutes and 53 seconds to dissolve.
-In 20 mL of room temperature water at 21 degrees celcius it took 3 minutes and 6 seconds to dissolve.
-In 20 mL of Boiled water at 56 degrees celcius it took 2 minutes and 38 seconds to dissolve.
4/19/11
Solubility Curve Lab:
Question: Does the temperature of the solvent affect the solubility of a mystery solute?
Hypothesis: Yes, it will.
Independent Variable: Temperature (degrees Celsius)
Dependent Variablel: Solubility (g/100 mL)
Constants: Volume of Water, Weighing Paper, Type of Solute
Procedures:
1. Measure 10, 8, 6, and 4 grams of solute.
2. Put solute in test tube with 10 mL of water.
3. Mix using a lab scoop while holding the test tube in a hot water bath.
4. After it has dissolved, place in a test tube rack and allow to cool.
5. Record the temperature when the first crystals appear.
The substance is: Potassium Nitrate.
4/26/11
Chemicals-Hazardous?!
Calcium Chloride:
CaCl2
-harmful if swallowed or inhaled
-irratates skin, eyes, and respiratory tract
-soluble in water
-white or gray
NOT SAFE!!!
Sodium Bicarbonate(Baking Soda):
NaHCO3
-can be consumed
-may cause irritation, redness, or pain to eyes
SAFE!!!
Bromothymol Blue:
C27H28Br2O5S
-pH indicator
-soluble in water
-toxic to lungs
-turns yellow when carbon dioxide is added
-green when it's neutral
-it can be blue when it's a base greater than 7
Water:
H2O
-has hydrogen and oxygen
-non toxic
-drinkable
-no need for lab glasses when using it
Chemical Reaction Clues:
-temperature change
-color change
-gas formation
-change of state
-can catch on fire
-explosions
-solid formation
Chemical Reaction Lab:
Question: What combinations of compounds will react chemically?
Hypothesis: Everything but Calcium Chloride & Water, Sodium Bicarbonate & Water, and Bromothymol Blue & Water will react.
Dependent Variable: Observations of chemical reactions.
Independent Variable: Different combinations of chemicals.
Constants: Amount of each chemical, and Mass of each chemical.
Summary: All but three were exothermic changes. Those that were increased in temperature, while the other three either did nothing or decreased. Two of the other three were endothermic because they decreased in temperature. These were the Sodium Bicarbonate & Water, and the Sodium Bicarbonate & Bromothyl Blue. The other one, Sodium Bicarbonate & Calcium Chloride, did nothing because it was two solids being mixed together. Although, when mixed with water they did have a chemica reaction.
5/10/11
Law of Conservation of Mass Lab:
Question: How will the mass of the reactants compare to the mass of the products in a reaction that produces
a solid percipitate?
Hypothesis: The mass will stay the same due to the law of conservation of mass.
DV: The mass of the products (g)
IV: The mass of the reactants
Constants:
-Mass of the glasswear
-same glasswear
-same balance
Procedures:
1. Zero the triple beam balance.
2. Then place the glass beaker with the chemicals in it on top.
3. Measure them and then record.
4. Dump them into the beaker and then measure again.
5. Record the products. (g)
6. Subtract and find the change in mass.
7. Do this again for 2 more trials after properly cleaning everything in between.
Observations:
-The mass of the products, 6.8, was 0.2 grams less than the mass of the reactants (7) : TRIAL 1
-The mass of the products and the reactants was 3.8 -there was no change : TRIAL 2
-The mass of the products and the reactants was 3.3 -there was no change : TRIAL 3
Conclusion:
The hypothesis was supported because the majority of the data showed that the mass was not affected. It was both a suspension and a solution. It was a suspension because the solid particles were heavy enough to settle out, but it was also a solution because when it is filtered out, it's not just pure water, it's a solution.
Class Data:
Minimum- 0
Quartile 1- 0
Median- 0
Quartile 3- 0
Maximum- 0.2
Median change was 0 grams.
5/11/11
Question: How will the mass of the reactants compare to the mass of the products in a reaction that produces a gas?
Hypothesis: The mass will not change due to the law of conservation of mass.
Dependent Variable: The mass of the products. (g)
Independent Variable: The mass of the reactants. (g)
Constants: mass of the glassware, same balance, same glassware